/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.cloud.all.security.access.expression;

import java.io.Serializable;

import cn.cloud.all.security.access.PermissionEvaluator;
import cn.cloud.all.security.core.Authentication;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * A null PermissionEvaluator which denies all access. Used by default for situations when
 * permission evaluation should not be required.
 *
 * @author Luke Taylor
 * @since 3.0
 */
public class DenyAllPermissionEvaluator implements PermissionEvaluator {

    private final Log logger = LogFactory.getLog(getClass());

    /**
     * @return false always
     */
    public boolean hasPermission(Authentication authentication, Object target, Object permission) {
        logger.warn("Denying user " + authentication.getName() + " permission '" + permission + "' on object " + target);
        return false;
    }

    /**
     * @return false always
     */
    public boolean hasPermission(Authentication authentication, Serializable targetId, String targetType, Object permission) {
        logger.warn("Denying user " + authentication.getName() + " permission '" + permission + "' on object with Id '" + targetId);
        return false;
    }
}
